摘要:
An antenna disposed on a substrate includes a radiating portion, a first coupling and feeding portion, and a second coupling and feeding portion. A length of the radiating portion is substantially equal to a half wavelength of electromagnetic signals radiated by the radiating portion. Each coupling and feeding portion includes a feeding part and a coupling part. The feeding part feeds the electromagnetic signals to the radiating portion via the coupling part so as to achieve effects of a multiple-input multiple-output (MIMO) antenna. A gap is defined between the coupling part and the radiating portion to improve an isolation of the MIMO antenna.
摘要:
An antenna structure including a ground plate, a hollow bolt, and a conductive conical dome is provided. The hollow bolt passes through the ground plate, and a signal wire is laid in the hollow bolt. An insulator is disposed between the signal wire and the hollow bolt for providing electrical isolation therebetween. The conductive conical dome is connected with one end of the signal wire. The hollow bolt and a nut are provided to fix the antenna on a wall or a ceiling. Since the signal wire is laid in the hollow bolt, the signal wire can be connected to a signal source only by connecting a signal cable to the hollow bolt.
摘要:
An antenna assembly includes a plurality of wireless signal transceivers and at least one positioning plate. Each of the wireless signal transceivers includes a base fixed on the positioning plate. The positioning plate has an expansion capability for a plurality of bases being fixed thereon, such that a user can add or reduce the number of the wireless signal transceiver independently.
摘要:
A waterproof housing is provided, which includes a first housing cover and a second housing cover that are snapped with each other to form an inner chamber, wherein the first housing cover has a closed annular-shaped outer retaining wall on one side and an inner retaining wall; a channel is naturally formed there-between; and the second housing cover has a closed annular-shaped embedding wall on one side that is correspondingly embedded into the channel. The housing formed by combining the outer retaining wall with the inner retaining wall takes the two retaining walls as two defenses to prevent the rain or foreign matters from entering into the chamber. Even if the rain penetrates into the channel via a gap by accident, the rain flows to the bottom part along the channel and is discharged from the drain holes disposed at the bottom, without being retained in the housing.
摘要:
A method for forming a high voltage and low voltage device is disclosed. According to the process, by the protection of the photoresist, the cap oxide layer on a high voltage device will not be removed in the dry etching process, and with the isolaton of cap oxide layer, the metal layer will not react on high voltage device to produce metal silicide. Accordingly, the high voltage device will not be spoiled by the silicide. The method tolerates normal silicide process, and high current feature of low voltage logic device. In addition, the prior cell library is still suitable for this process.
摘要:
A portable electronic device includes an image capturing unit, a processor unit connected to the image capturing unit, and an alarm unit connected to the processor unit. The image capturing unit captures outside images, the processor unit detects if there is any smoke near the portable electronic device according to the images and measuring relative parameters of detected smoke, and the alarm unit alarms when at least one parameter of detected smoke is out of predetermined acceptable ranges.
摘要:
A waterproof housing is used for accommodating electronic components of an antenna device. The waterproof housing includes a casing and a base body. The casing has a plurality of combination holes disposed on a sidewall thereof, and the electronic components are disposed on the base body. The base body has a plurality of combination members corresponding to the combination holes. The electronic components are accommodated inside the casing by snapping the combination members and the combination holes. The positions of the electronic components are higher than those of the combination holes, when rain water comes into the casing through the combination holes, the rain water will flow down into the base body, and thus the electronic components are prevented from being wet and damaged by the rain water.
摘要:
A directional antenna structure is provided, which includes a patch antenna, a reflection plate, a cable connector, and a frame for the patch antenna, the reflection plate, and the cable connector to be fixed and assembled thereon. Through such a modular design, the antenna structure is manufactured and assembled through a simplified process, and besides this advantage, the antenna structure is further selectively integrated with a housing having the same assembly interface, and thus becoming a modular antenna structure integrated with various housings.
摘要:
A method for forming bipolar junction transistor with high gain via formulation of high voltage device in deep submicron process is disclosed. A substrate including a first part, a second part, and a third part is primarily provided; then, a first well in the first part and a second well in the second part are formed. A plurality of field oxide regions are formed on said substrate; subsequently, two third wells are formed in said third part. The following steps are to form a fourth well in said first well in said first part and two fifth wells in said second well in said second part; and to form a first gate on said first part between said two third wells, and a second gate on said second part between said two fifth wells. Next, a first spacer against said first gate and a second spacer against said second gate are formed. Further, first ions are introduced into said first part to serve as a collector region, and into said third part to serve as a first source/drain region. Finally, second ions are introduced into said first part to form an emitter region and a base region of a bipolar junction transistor, and into said second part to form a second source/drain region.
摘要:
A method of reducing leakage current of a photodiode on a semiconductor wafer. The semiconductor wafer has a p-type substrate, a photosensing area, and at least one shallow trench surrounding the photosensing area. First, a doped polysilicon layer containing p-type dopants is formed in the shallow trench. Then, the p-type dopant in the doped polysilicon layer is caused to diffuse into the p-type substrate to form a p-type doped region surrounding a bottom of the shallow trench and walls of the shallow trench. After that, the doped polysilicon layer is removed and an insulator material is filled into the shallow trench to form a shallow trench isolation (STI) structure. Finally, an n-type doped region is implanted to form a photosensor. Here, the p-type doped region in the photosensing area is used to decrease the electric field surrounding the photosensing area and decrease the leakage current.